A United States Attorney is a federal prosecutor who represents the United States government in legal matters. They handle criminal cases, civil litigation, and appeals in federal courts. Each of the 94 federal judicial districts has its own U.S. Attorney, who is appointed by the President of the United States and confirmed by the Senate. U.S. Attorneys work on a variety of cases, including drug trafficking, immigration violations, and white-collar crimes. They collaborate with other law enforcement agencies, such as the FBI and DEA, to investigate and prosecute offenders, ensuring that federal laws are upheld across the country.